. >> it will be a heightened the law enforcement presence consistent with the severity and seriousness of ongoing investigation. people should expect those riding tehe t,th there will be random bad checks. >> security has been stepped up at a sensitive locations around the world. boston may have been the target. the impact is being felt much further. 3 people killed in that attack. boston hospitals have been inundated with injured people. 144 people injured and being treated. that includes 10 children. 17 are in critical or life- threatening conditions. 10 people have had to have their limbs amputated. a sign of how serious that attack was. to other news now. barack obama will welcome his counterpart to washington for talks next week. this comes as north korea makes threats against the southern neighbor. state television says the statement saying it would attack enemies without notice. the statement came as north korea marked the birthday of the founding father. north korea says the latest military threat against the south comes as a response to conservative groups protest in the middl